A-A+
The third paragraph suggests that ______.A．mod
问题详情
The third paragraph suggests that ______.
A．modern dams are all made of concrete
B．Romans once built many great dams
C．there was too much water in Iraq in the past
D．modern dams are better than early dams请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
解析：由第三段最后“TheRomansweregreatdam-builders．．．”(罗马人曾是伟大的大坝修建者)可推知答案“罗马人曾经修建了很多宏伟的大坝”。[A]与原文细节“现代大坝通常是由混凝土建造的”稍有出入；[C]项与原文对应细节“过去伊拉克修建了很多灌渠为了灌溉庄稼”(说明不可能有太多的水)不符；文中没有涉及到现代大坝和早期大坝哪个更好的问题，故[D]项错。
